Ethyl 4-hydroxy-3-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-2-carboxylate
Methyl 2-(difluoromethyl)-6-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 4-hydroxy-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxylate
2-(Difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine-6-acetic acid